Which of the following flowcharts correctly represents the process of blood clotting?

Statement-$I$: The first heart sound $(lub)$ is associated with the opening of the tricuspid and bicuspid valves.
Statement-$II$: Cardiac output of an athlete is much higher than that of an ordinary man.

All of the following are vasoconstrictor agents except:

Cardiac output is determined by which of the following?

Match the following:
Types of leucocytes | Function
$A.$ Neutrophils | $1.$ Heparin and histamine secretion
$B.$ Basophils | $2.$ Antibodies formation
$C.$ Acidophils | $3.$ Scavenger
$D.$ Monocytes | $4.$ Phagocytes
$E.$ Lymphocytes | $5.$ Antiallergic and healing of wounds
The correct pairing sequence is:

Consider the following four statements regarding the human circulatory system:
$(a)$ Arteries have thick walls and have a smaller lumen compared to veins.
$(b)$ Angina is a sudden chest pain.
$(c)$ In the $ABO$ blood grouping system,a person with $AB$ blood group can donate blood to anyone.
$(d)$ Calcium ions play an important role in blood clotting.
Which two of the above statements are correct?